126990763 has 4 divisors (see below), whose sum is σ = 127843200. Its totient is φ = 126138328.

The previous prime is 126990749. The next prime is 126990769. The reversal of 126990763 is 367099621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126990763 is a prime.

It is a super-2 number, since 2×126990763² = 32253307774644338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126990769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425995 + ... + 426292.

It is an arithmetic number, because the mean of its divisors is an integer number (31960800).

Almost surely, 2^126990763 is an apocalyptic number.

126990763 is a deficient number, since it is larger than the sum of its proper divisors (852437).

126990763 is an equidigital number, since it uses as much as digits as its factorization.

126990763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852436.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 126990763 is about 11269.0178365286. The cubic root of 126990763 is about 502.6403828795.

The spelling of 126990763 in words is "one hundred twenty-six million, nine hundred ninety thousand, seven hundred sixty-three".